BTEX degradation and enhancement in subsurface environment by iron reducing microorganism

The static experiments were constructed to investigate the degradation and enhancement of BTEX by iron reducing microorganism in subsurface environment. The results indicated that the electron acceptor species had significant effects on the degradation of BTEX, When the BTEX concentration was 100mg/L, towad the degradation rate of BTEX and the reduction rate of Fe(III) to decrease in the order akaganeite >;goethite>; hematite; When the akaganeite was acted as electron donor, BTEX concentration had an impact on its degradation, the degradation of 100mg/L BTEX was relatively better, after reacting 40 days, the degradation rate of benzene, toluene, ethylbenzene, xylene were respectively 46.34%, 58.14%, 59.22%, 69.64%, and the Fe(III) reduction rate was 49.25%; After adding cosubstrate of citric acid, the microbial activity was enhanced, the degradation of BTEX and the reduction of Fe(III) were both improved.